{"transactions":[{"id":856489,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2026-03-06T22:00:06.000Z","date":"2026-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":986,"price":3.27,"value":3224.22,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 5,593 shares of Common Stock and 9,737 RSUs."}],"balance_after":15330,"source":{"system":"sec-edgar","filing":"0001193125-26-096817","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312526096817/ownership.xml","form_type":"4"}},{"id":1040752,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2025-09-15T21:00:07.000Z","date":"2025-09-13","kind":"tax_withholding","planned":false,"acquired":false,"shares":1563,"price":6.59,"value":10300.17,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"1. Shares withheld by Registrant to satisfy minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"2. Represents 3,761 shares of Common Stock and 12,555 RSUs."}],"balance_after":16316,"source":{"system":"sec-edgar","filing":"0001193125-25-203735","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312525203735/ownership.xml","form_type":"4"}},{"id":1068088,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2025-08-13T21:00:06.000Z","date":"2025-08-13","kind":"sale","planned":false,"acquired":false,"shares":2000,"price":7.54,"value":15080.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 17,879 Restricted Stock Units."}],"balance_after":17879,"source":{"system":"sec-edgar","filing":"0000950170-25-108149","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025108149/ownership.xml","form_type":"4"}},{"id":1068087,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2025-08-13T21:00:06.000Z","date":"2025-08-12","kind":"sale","planned":false,"acquired":false,"shares":4410,"price":7.31,"value":32237.1,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These transactions were executed in multiple trades at prices ranging from $7.31 to $7.32. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":19879,"source":{"system":"sec-edgar","filing":"0000950170-25-108149","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025108149/ownership.xml","form_type":"4"}},{"id":1217955,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Performance Share Units","published_at":"2025-03-07T21:50:26.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":9566,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."}],"balance_after":9566,"derivative":{"exercise_date":"2028-03-05","underlying":"Common Stock","underlying_shares":9566},"source":{"system":"sec-edgar","filing":"0000950170-25-035612","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035612/ownership.xml","form_type":"4"}},{"id":1217954,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-03-07T21:50:26.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":6742,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The options vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028."}],"balance_after":6742,"derivative":{"exercise_price":7.84,"expiration_date":"2035-03-05","underlying":"Common Stock","underlying_shares":6742},"source":{"system":"sec-edgar","filing":"0000950170-25-035612","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035612/ownership.xml","form_type":"4"}},{"id":1217953,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2025-03-07T21:50:26.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":4783,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 6,410 shares of Common Stock and 17,879 RSUs."}],"balance_after":24289,"source":{"system":"sec-edgar","filing":"0000950170-25-035612","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035612/ownership.xml","form_type":"4"}},{"id":1217952,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2025-03-07T21:50:26.000Z","date":"2025-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":428,"price":7.84,"value":3355.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."}],"balance_after":19506,"source":{"system":"sec-edgar","filing":"0000950170-25-035612","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035612/ownership.xml","form_type":"4"}},{"id":1406897,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2024-09-16T22:21:42.000Z","date":"2024-09-13","kind":"tax_withholding","planned":false,"acquired":false,"shares":1711,"price":24.84,"value":42501.24,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 5,614 shares of Common Stock and 14,320 RSUs."}],"balance_after":19934,"source":{"system":"sec-edgar","filing":"0000950170-24-106936","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024106936/ownership.xml","form_type":"4"}},{"id":1589573,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-03-07T21:49:01.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":5371,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027."}],"balance_after":5371,"derivative":{"exercise_price":16.34,"expiration_date":"2034-03-05","underlying":"Common Stock","underlying_shares":5371},"source":{"system":"sec-edgar","filing":"0000950170-24-028099","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024028099/ownership.xml","form_type":"4"}},{"id":1589572,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2024-03-07T21:49:01.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":3671,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 2,000 shares of Common Stock and 19,645 RSUs."}],"balance_after":21645,"source":{"system":"sec-edgar","filing":"0000950170-24-028099","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024028099/ownership.xml","form_type":"4"}},{"id":1781233,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Stock Option (Right-to-Buy)","published_at":"2023-09-14T20:37:01.000Z","date":"2023-09-13","kind":"grant","planned":false,"acquired":true,"shares":15974,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on September 13, 2024, an additional one-third of the shares on September 13, 2025, and the remaining one-third of the shares on September 13, 2026."}],"balance_after":15794,"derivative":{"exercise_price":6.26,"expiration_date":"2033-09-13","underlying":"Common Stock","underlying_shares":15794},"source":{"system":"sec-edgar","filing":"0001209191-23-049441","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123049441/doc4.xml","form_type":"4"}},{"id":1781232,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Accounting Officer"}}],"security":"Common Stock","published_at":"2023-09-14T20:37:01.000Z","date":"2023-09-13","kind":"grant","planned":false,"acquired":true,"shares":15974,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on\nSeptember 13, 2024, an additional one-third of the shares on September 13, 2025, and the remaining one-third of the shares on September 13, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 15,974 RSUs."}],"balance_after":17974,"source":{"system":"sec-edgar","filing":"0001209191-23-049441","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123049441/doc4.xml","form_type":"4"}},{"id":2046562,"issuer":{"id":2319,"kind":"organization","name":"Symbotic Inc.","symbol":"SYM"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President & Controller"}}],"security":"Restricted Stock Units","published_at":"2023-01-25T22:13:34.000Z","date":"2023-01-23","kind":"grant","acquired":true,"shares":57188,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units vest as follows: 1/3 of the restricted stock units vest on January 23, 2024, and 1/12 of the restricted stock units vest quarterly thereafter, subject to the Reporting Person continued service with the Issuer on the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The restricted stock units vest as follows: 1/3 of the restricted stock units vest on January 23, 2024, and 1/12 of the restricted stock units vest quarterly thereafter, subject to the Reporting Person continued service with the Issuer on the applicable vesting dates."}],"balance_after":57188,"derivative":{"underlying":"Class A Common Stock","underlying_shares":57188},"source":{"system":"sec-edgar","filing":"0001837240-23-000045","document":"wf-form4_167468479730307.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1935618/000183724023000045/wf-form4_167468479730307.xml","form_type":"4"}},{"id":2178498,"issuer":{"id":2319,"kind":"organization","name":"Symbotic Inc.","symbol":"SYM"},"owners":[{"id":62347,"kind":"person","name":"Daniel Santhosh P","position":1,"cik":"0001935618","reported_name":"Daniel Santhosh P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Vice President & Controller"}}],"security":"Restricted Stock Units","published_at":"2022-08-19T21:52:03.000Z","date":"2022-08-17","kind":"grant","acquired":true,"shares":18975,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units vest as follows: 1/3 of the restricted stock units vest on August 17, 2023, and 1/12 of the restricted stock units vest quarterly thereafter, subject to the Reporting Person continued service with the Issuer on the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The restricted stock units vest as follows: 1/3 of the restricted stock units vest on August 17, 2023, and 1/12 of the restricted stock units vest quarterly thereafter, subject to the Reporting Person continued service with the Issuer on the applicable vesting dates."}],"balance_after":18975,"derivative":{"underlying":"Class A Common Stock","underlying_shares":18975},"source":{"system":"sec-edgar","filing":"0001837240-22-000028","document":"wf-form4_166094591071555.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1935618/000183724022000028/wf-form4_166094591071555.xml","form_type":"4"}}]}